Carbon compounds of the anthraquinone series



Patented July 28, 1936 one rates PATENT. "OFFICE CARBON COMPOUNDS OF THE ANTHRA- QUINONE SERIES Earl Edson Beard, Arden, DeL, assignor to E. I. du Pont de Nemours & Company, Wihnington, DeL, a corporation of Delaware No Drawing. Application October 16, 1931, Serial No. 569,267

7 Claims.

This invention relates to carbon compounds and processes for. their production. More particularly it relates to dyes and dye intermediates of the anthraquinone series. It especially con- "5 templates the compounds having the probable formula:

A and Z representing organic radicals or nuclei, and the production of such compounds from 1- nitro-anthraquinone-fi-carboxylic. acid.

Eckert in 1914 (Monats. fur Chemie 35 289) showed that by nitrating anthraquinone-betaaldehdye and oxidizing the resultant nitro-anthraquinone-aldehdye that the compound 1- nitro-anthraquinone-G-carboxylic acid is produced.

An object of this invention is the production of new and valuable chemical compounds. Other objects are to produce new dyes, new dye intermediates, new chemical processes and in general to advance the art. Other objects will appear hereinafter. 1

These objects are accomplished by treating 1- nitro-anthraquinone-G-carboxylic acid in such a Way as to produce compounds having the probable formula set out above.

In general, this treatment may be carried out in difierent ways as follows:

Process I 1N0zanthraquinone6-COOH A and'"Z representing organic nuclei, radicals,

: residues or groups.

Process II INO;anthraquinone-6COOH 1NHzanthraquinone6CO0H J, O 5 1NHzanth1-aquinone6(yhalogen A and Z representing organic nuclei, radicals, residues or groups.

. Process III 20 -A' and Z representing organic nuclei, radicals,

A and Z representing organic nuclei, radicals, residues or groups.

The invention will be further understood from a consideration of the following examples in which the parts are given by weight.

I. PREPARATION or" l-AMINO-ANTHRAQUINONE-G-CAB- BOXYLIC Acn) Ewample I Ten (10) parts of 1-nitro-anthraquinone-6- carboxylic acid were dissolved in 200 parts of Water containing five (5) -'parts of soda ash. Eighteen (18) parts of sodium sulfhydrate solution (30% NaSH) were then added and the solution heated at C. for 1-2 hours. Sodium sulphate, 50 parts, was then added to the solution of the sodium salt of 1-amino-anthraquinone-G-carboxylic acidand the whole allowed to cool to 25 C. The product was then filtered and washed with a 20% Na2SO4 solution until the filtrate became clear. The free l -amino-anthraquinone-G- carboxylic acid was obtained after acidification of the sodium salt. The reactions taking place are illustrated by the following:

1N 0 zanthraquinone60 O OH II. CoNnENsA'rIoN or! l-AMINO-ANTHRAQUINONE-G- GARBOXYLIC A011) WITH A011) HALIDES Emample II Ten (10) parts of 1-amir'1o-anthraquin0ne-6- carboxylic acid and 5 parts of acetyl chloride were condensed in -150 parts of xylene at -140" C; The product of the reaction is believed to have the following structural formula:

' n i CHr-C-N O (ll-OH Y A Example III vat. The reduced product on oxidation changes color from red to brown.

Example IV Ten (10) parts of 1-amino-anthraquinone-6- carboxylic acid were reacted with 8 parts of meta.- methoxy-benzoyl-chloride in 100 parts of xylene while heating at 130-150 C. for 1-2 hours. The formula of the final product is as follows:

u i t g. OOH Y 0..

Example V Twenty-six and four-tenths (26.4) parts :of

1-amino-anthraquinone-G-carboxylic acid. and ten (10) parts of terephthaloyl chloride were condensed in 100 parts of nitrobenzene at -145? C. The final product is thought to have the following structural formula:

O IITH o(I]=O n Y HO-C Example VI Ten (10) parts of l-amino-anthraquinone-G- carboxylic acid were reacted with 7.5 parts of beta-naphthoyl-chloride in 70 parts of ortho-dichloro-benzene by heating at 125-145. C. for 1'-2 hours. The resultant compound was isolated, washed and dried. The formula of the final product follows: I

Example VII Ten (10) parts of l-amino-anthraquinone-G- carboxylicacid and 10.2 parts of anthraquinone- 2-carbonyl-chloride were condensed in 100 parts 'l t 0 Y I 0 of nitrobenzene at 150 C. The final product is believed to have the following structural formula:

- This product produces a yellow sulphuric acid solution and vats to a wine colored alkaline hydrosulphite solution. On the fiber the product oxidizes through green to brown.

Example VIII Ten (10) parts of l-nitro-anthraquinone-S- carbonyl-chloride and 8.5 parts of l-aminoanthraquinone-S-carboxylic acid were heated together in parts of nitrobenzene at 150 C. for 1-2 hours. The reaction mass was cooled, diluted with alcohol and filtered. The final product is believed to have the following structural formula:

II 'O=N o 0 H II I o-N 0 II I 0 The resultant product produces a greenish-yellow sulphuric acid solution and is reduced in an alkaline hydrosulphite vat to the corresponding amino body. The vat is red in color and dyes cotton fiber red.

Example IX Ten (10) parts of 2-anthraquinoyl-amino-1'- anthraquinone-6-carbonyl chloride (Example VII) and 5.1 parts of 1-aminoanthraquinone-6- carboxylic acid were condensed in parts of nitrobenzene at C. The final product is believed to have the following structural formula:

Ten (10) parts of l-amino-anthraquinone-ficarboxylic acid were heated and stirred with 11.8 parts of 1:9-anthraiso-thiazole-2-carbonyl chloride in 300 parts nitrobenzene to 150 C. for one hour. The new condensation product separates out in yellow needles and may be filtered 01f after cooling the charge. The final product is believed to have the following structural formula:

This product produces an orange to yellow color in sulphuric acid and a blue colored alkaline hydrosulphite vat. The reduced product on oxidation changes color on the fiber from blue to green to brown to yellow.

Example XI Ten (10) parts of l-amino-anthraquinone-G- carboxylic acid were heated and stirred with 13 parts of 1z9anthraiso-selenazole-Z-carbonyl chloride in 300 parts nitrobenzene to 150 C. for one hour. The new condensation product separated out in yellow needles and was filtered ofi after cooling the charge. The final product is believed to have the following structural formula:

NS A I 0 H II I o-N o O I II 0 Owe- 0 0 Example XII Six and eight-tenths (6.8) parts of l-aminoanthra-quinone-G-carboxylic acid and 10 parts of anthraquinone 2: l-phenyl acridone-4=-carbonyl chloride were heated together in 200 parts of nitrobenzene at BIO-150 C. for 2-3 hours. The reaction mass was filtered, washed with alcohol and dried. The final product is believed to have the following structural formula:

I H-N 0 0 III. PREPARATION or 1-ACYL-AMINO-ANTHRAQUINONEr G-CARBoNYL-HALIDES Example XIII The product of Example III was heated with 8 parts of phosphorus pentachloride in 40 parts of toluene at 85-95 C. for one-half to one. hour. The resultant product has the following probable formula:

Example XIV The product produced in Example VII was heated with 17 parts of phosphorus pentachloride Q to yellow colored solution.

in 200 parts of nitrobenzene at C. for one to one and one-half hours. The reaction mass was cooled, diluted with benzene and filtered. The reaction product has the following probable formula:

Example XV The wet cake resulting from the process of Example X was suspended in 100 parts of nitrobenzene and 16 parts of phosphorus pentachloride added and the resultant mass heated to 100 C. and held for one hour. After cooling the product was filtered, washed with nitrobenzene and benzene and dried. The compound produced has the following probable formula:

II I

.and is an orange to yellow crystalline powder soluble in pyridine with a yellow color. It dissolves in sulphuric acid with the evolution of hydrochloric acid and the production of an orange Example XVI The wet cake resulting from the process of Example XI was suspended in 100 parts of nitrobenzene, 16 parts of phosphorus pentachloride added and the mass heated to 100 C. where it was held for one hour. After cooling the reaction mass was filtered, and the solid acid chloride washed with nitrobenzene and petroleum ether and dried. The compound produced has the following probable formula:

and is a dark yellow crystalline powder soluble in concentrated sulphuric acid and pyridine with a yellow color. Hydrochloric acid is evolved from the sulphuric acid solution.

ExampZe 'XVII The product produced by the process of Example XII was heated with 15 parts of phosphorus pentachloride in 100 parts of .nitrobenzene at .90-100" C. for one hour. The resultant product has the following probable formula:

IV. CONDENSATION or l-ACYL-AMINO-ANTHRAQIJI- NONE-G-GARBONYL HALIDE'S WITH AMINES Example XVIII Ten (10) parts of benzoyl-arnino-l anthra-.

quinone-G -carbonyl chloride "(Examples III and.

XIII) were reacted with lxlparts of para-phenylene-diamine in 109 parts of nitrobenzene at C. The final product is believed to have the following structural formula:

final product is believed to have the following structural formula:

Example XIX "1i i CN o II R f y I II I o H t-i 0 H Example XX Ten (10) parts of benzoyl-amiho-l-ahthraquinone-6 carbonyl-chloride (Examples III. and 75 XIII) and 3.0 parts of 1: 5-di-amino-anthraquinone were placed in 100 parts of nitrobenzene and reacted at 150 C. The final product is believed to have the following structural formula:

The resultant product produces a yellow color in sulphuric acid and dyes cotton in yellowish shades from a Bordeaux to brown colored hydrosulphite vat.

Example XXI t I 0 I H o H y i i Example XXII Ten (10) parts of l-benzoyl-amino-anthraquinone-G-carbonyl chloride (Examples III and XIII) were suspended in 150 parts of nitrobenzene and 8.8 parts of mono-benzoyl-1z5-di-amino-anthraquinone added at room temperatures. The mass was heated to 140-150 C. and this temperature maintained for two hours. The resultant dyestulf was filtered at 80 0., washed and dried. It is a yellow product and is soluble in sulphuric acid with a yellow color. It dyes cotton in extremely fast yellow shades from a Bordeaux vat. The final product is believed to have the following structural formula:

Ezcample XXIII Ten parts of benzoyl-amino-anthraquinone-G-carbonyl chloride (Examples III and XIII) and 6.5 parts of 1:9-anthraisothiazole-2- amine were caused to react by heating together in 250 parts of nitrobenzene at 150 C., for 2-3 hours. The final product is believed to have the following structural formula:

The resultant product was isolated and dried. It gives a yellow to orange color in sulphuric acid and a red colored alkaline hydrosulphite vat. The leuco compound oxidizes on cotton through orange to yellow-brown to yellow shades.

Example XXIV Ten 10) parts of the acid chloride of the compound produced according to Example V were condensed with 6.4 parts of alpha-amino-anthraquinone' by heating in 200-300 parts of nitrobenzene at 140-l50 C. for 2 hours. The final product is believed to have the following structural formula:

Example XXV Ten (10) parts of l-m'eta-methoxy-benzoylamino-anthraquinone-6-carbonyl chloride (Ex- 40 ample IV) were condensed with 5.3 parts of a1- pha-amino-anthraquinone by heating in I parts of nitrobenzene at C. for 2 hours. The final product is believed to have the following structural formula:

H AMY Example XXVI Ten (10) parts of l-beta-naphthoyl-aminoanthraquinonefi-carbonyl chloride (Example 'VI) and 5.1 parts of alpha-amino-anthraquinone were caused to react by heating together in 120 parts of nitrobenzene at 140 C. for 1-2 hours. The final product is believed to have the following structural formula:

Example XXVII Ten (10) parts of l-beta-anthraquinoyl-amino- (Example anthraquinone-fi-carbonyl chloride VII) and 4.3 parts of alpha-amino-anthraqui-l none were caused to condense by heating together in parts of nitrobenzene at 150 C. for 2 hours. The final product is believed to have the following structural formulai Example XXVIII Ten (10) parts of 2-anthraquinoyl-amino-1- anthraquinone-G'-carhonyl chloride (Example VII) was condensed with 6.6 parts of mono-benzoyl-l:S-diamino-anthraqifinone in 150 parts of nitrobenzene at 150-160 C. The final product is believedrto have the following structural formula The resultant product produces a yellow color in sulphuric acid and dyes cotton in a greenish yellow shade from a red-brown colored alkaline hydrosvlphite vat.

Example XXIX Ten (10) parts of 2-anthraquinoyl-amino-1'- anthraquinone-G'-carbonyl chloride (Example VII) and 6.6 parts of l-amino-anthraquinone- 6-carb0xylic-acid-anilide were placed in parts of nitrobenzene and condensed at C. The final product is believed to have the following structural formula:

This product gives a yellow sulphuric acid solution and a red alkaline hydrosulphite vat. It dyes cotton in greenish yellow shades.

Example XXX Ten (10) parts of 2anthraquinoyl-amino-1- anthraquinone-G-carbonyl chloride (Example VII) and 2.25 parts of 1:5-di-amino-anthraquinone were caused to react in 150 parts of nitrobenzene at 150-160 C. The final product is believed to have the following structural formula:

The resultant product produces a yellow color in sulphuric acid and dyes cotton in a greenish yellow shade from a red-brown colored alkaline hydrosulphite vat.

Example XXXI Ten (10) parts of 2-anthraquinoyl-amino-lanthraquinone-6'-carbonyl chloride (Example VII) and 2.25 parts of 1:4-diamino-anthraquinone were reacted in 150 parts of nitrobenzene at 150-160 C. The final product is believed to have the following structural formula:

0 II no l l in the order named. The final product is believed to have the following structural formula:

The'dyestufi produced gives a yellow to orange color when dissolved in sulphuric acid and dyes cotton in greenish-yellow shades from a blue alkaline hydrosulphite vat.

Example XXXIII Ten (10) parts of 1z9-anthraisothiazoyl-amino- 1' anthraquinone 6 carbonylchloride (EX- amples X and XV) and 3.5 parts of para-bromaniline were heated together in 150 parts of nitrobenzene at -150" C. for 1-2 hours. The reaction mass was cooled and filtered. The final product is believed to have the following structural formula:

ii 0 0 0 o I I O Y the resultant product gives a yellow sulphuric acid solution and dyes cotton in greenish-yellow shades from a blue hydro-sulphite vat.

Example XXXIV Ten (10) parts of l:9-anthraisothiazoyl-amino- 1' anthraquinone 6 carbonyl chloride (Examples X and XV) and 3 parts of para-anisidine were heated together in parts of nitrobenzene at140-150 C. for 1-2 hours. The reaction mass was cooled and filtered. The final product is believed to have the following structural formula:

the resultant product gives a yellow sulphuric acid solution and dyes cotton in greenish-yellow shades from a blue hydro-sulphite vat.

Example XXXV Ten (10) parts of 1:Q-anthraisothiazoyl-amino- 1 anthraquinone 6' carbonyl chloride (Examples X and XV) and 4 parts of 2:5-di-chloraniline were heated together in 150 parts of nitrobenzene at PLO-150 C. for 1-2 hours. tion mass was cooled and filtered. The final product is believed to have the following structural formula:

the resultant product gives a yellow sulphuric acid solution and dyes cotton in greenish-yellow shades from a blue hydro-sulphite vat.

Example XXXVI 1 Ten (10) parts of l:9-anthraisothiazoyl-amino- 1-anthraquinone-6-carbonyl chloride (Examples X and XV) and 3.2 parts of di-phenyl amine were heated together in 150 parts of nitrobenyellow needles separated out and was filtered at The reaczene at 140-150" Cjfor 1-2 hours; The reaction mass was cooled and filtered. The final-product is believed to have the following structural The resultant product gives alyellow sulphuric 15V acid solution and dyes cotton in greenish-yellow shades from'a blue hydro-sulphite vat.

Example XXXVII Ten (10) parts of 1:9-anthraisothiazoyl-amino- O 1'anthraquinone-6carbonyl chloride (Examples X and XV) and 2.6 parts of alpha-naphthylamine were heated together in 1 50 parts of nitrobenzene at PLO-150 C. for 1-2 hours. The reaction mass was cooled and filtered. The final product 25 is believed to have the following structural formula: 1

. O H Agata.

I 0 o-N- g (i it The resultant product gives a yellow sulphuric acid solution and dyes cotton in greenish-yellow shades from a blue hydro-sulphite vat.

Example XXXVIII In 250 parts of nitrobenzene there was suspended 10 parts of 1:9'-anthraisothiazoyl-l-aminoanthraquinone-6-carbonyl chloride (Examples X and XV) and 6.2 parts of monobenzoy1-1z5-diamino-anthraquinone and the resultant suspension heated at 150 C. for a period of one and one-half hours. The product which consistedof Bil-96 C., washed with nitrobenzene and alcohol, and dried. It dissolves in concentrated sulphuric acid with yellow to orange color and dyes cotton from a blue vat in fast yellow shades. The final product is believed to have the following structural formula:

Example XXXIX Ten 10) parts of 1:9-anthraisothiazoyl-amino- 1-anthraquinone-6' -carbonyl chloride (Examples 75 X and XV) and 4 parts of beta-amino-phenazine were heated together in 150 parts of nitrobenzene at 140-150 C. for l-2 hours. The reaction mass was cooled and-filtered. The final product is believed to have the following structural formula: V i

N- The resultant product gives a yellow sulphuric acid solution and dyes cotton in greenish-yellow shades from a blue hydrosulphite vat.

Example XLI Ten (10) parts of anthraquinone 2zl-phenylacridone 4'-carbony1-an'lino-1"-anthraquinone- 6"-carbonyl chloride (Examples XII and XVII) were suspended in 200 parts of aniline and heated at 135-150" C. for one hour. The reaction mass was cooled, filtered and washed respectively with aniline, dilute hydrochloric acid and water. The final product is believed to have the following The dyestuif produced yields yellow to orange colored sulphuric acid solutions and dyes cotton in orange shades from red violet" alkaline hydrosulphite vats. l v

It is'to be understood that the invention is not limitedtothe preparation of the particular comipounds 'set out in the above examples. general formula, A and Z may represent any or- In the ga'nic radical or residue. For the condensation with the amino group of the l-amino-anthraquinone-G-carboxylic acid there may be used acyclic carbonyl halides, carbocyclic carbonyl halides and heterocyclic carbonyl halides. Particularly desirable results are obtained with such compounds as acetyl-chloride. acetyl-bromide, chlor-acetyl-chloride, propionyl-chloride, succinyl-chloride, oxalyl-chloride,

Benzoyl chloride Benzoyl bromide anisyl chlorides nitro-benzoyl chlorides NOr- 0 chloro-benzoyljchlorides Tere-phtheloyl chloride lsovphtahahlic acid chloride Alpha-naphthoyl chloride Beta-naphthoyl chloride Beta-anthrequlnone-carbonyl chloride Beta-anthraquinone-carbonyl bromide l-amino-enthraquinone-2 carbonyl chloride l-amino-anthraquinone-fi-carbonyl chloride 1-c111oro-anthraq none-2-carbony hl ide l-chlorwanthraquinone-fi-carbonyl chloride 1, 9-authraisothiazole-2-carbony1 chloride 1, Q-anthraisothiazole-4-carbonyl chloride 1, Q-anthraisothiazo1e-5-carbonyl chloride 1, 9-anthraisoselenazole-2-carbonyl chloride 1 1, 9'anthraisothiophene-Harbonyl chloride Anthraquinone 2:l-phenyl-acridone-4-carbony1 chloride 1, s-enthraiscthiazoyl-amincelfz) g-anthraquinone6'-cerbonyl 1, 9-anthraisoselenazole-amino-(2)-1-anthraquinone-6-carbonyl chloride l-phenyl-acridone-4'-carbonyl-amino-l -anthra- Anthraquinone-z,

, quinone-6-carhonyl chloride For the condensation with the acid chloride group of the 1-amino-anthraquinone-6 carbonyl halide, especially desirable results are produced with such acyclic, carbocyclic and heterocyclic amines as, amino-acetic acid, methyl-amine, ethyl-amine, n-amyl-amine, n-hexyl-amine,

ethylene-diamine, tri-methylene-diamine,

l Aniline V Di-phenyl-amine Para-brom-aniline Para-anisidine 2, B-di-chlor-aniline Para-nitraniline Para-phenylene-diamine amino-benzoic acids Alpha-naphthylamine Beta-naphthylamine Benzidine Beta-amino-anthrequinone Alpha-amino-anthraquinone 1, 5-diamino-anthraquinone l, 4-diamino-anthraqulnone' l-eminoi-methoxy-anthraquinone l-amino-5-benzoyl-amino-anthraqulnone damino-Mhloro-anthraquinone 1 l-amino+chloro-anthifaquinone V l-amino-5-chloroanthraduinone Q .l amino-fi-chloro-anthraquinone l,5-'diamino-4,S-diehloto-ahthraquinone l-amino-anthraquinone-6-carboxylic acid l-amino-anthraduinoneJ-carborylic acid 7 1, 5-diaminoPhydroxy-anthraquinonc 1, 5-diamino-4, 8-di-hydroxyanthraquinone 1, 5-diamino-4, 8 di-methoxy-anthraquinone Bz-l-amino-benzanthrone Bz-l-amino-Z-methyl-benzanthrone 1, Q-ammaiSOmiazOE-aamme '1, 9-anthraisothiazole-4-amine 1, 9-anthraisothiazole-5-amine l, 9-anthraisoselenazole-2-amine 1, -anthtaisoselenazole-4-amine 1, Q-anthraisoselenazole-fi-amine Beta-amino-phenazine Piperidine Pyridine Dyestuffs having the specific formula:

in which -Y is a 'carbocyclic radical, have been found to have exceptionally desirable properties. Compounds falling Within the general formula formed from amines whose molecular weight is less than 223 also merit special mention.

In the course of the specification certain equations and formulae have been given for the purpose of aiding in the understanding of the invention'. These formulaehave not been proven except by the invention herein described, and therefore it is not desiredto limit the invention by the same.

As will be clearfrom the examples the solvent (if any) used may be varied over a wide zrange depending uponthe characteristics of the particular condensation or conversion being carried out. The particular temperatures and time utilized for the various condensations and conversions depend upon the characteristics of the substances being treated. The-solvent, temperature, time and other features of the invention which are most desirable for any particular 7 treatment maybe determined by one'skilled in theart. r v r :7

Especially desirable results havebeen obtained with such solvents as nitrobenzene, chloro-,

benzene," .ortho-di-chlororbenzene, toluene; xylene, naphthalene and the like. 7 j i v, Any desired agent may be used in the conversion to the carbonyl halide. 7

Throughout the specification and claims the term vat color is used to cover compoundssusceptible to vatting by anyof the methods known to the art. a The subject matter of this specification involves an entirely new field of anthraquinonevat dyes. The compounds produced have very desirable properties. While the. shade of the dyes produced; varies with the particular formula, in gen eral, the colors fall withinthe range of orange, yellow and brown. V '1 As many'apparently widely: difierent embodiments of this invention may be made without departing from the spirit and scope thereof, it .is

specific embodiments thereof except as defined in'the appended claims. V 'Iclaim:

1.-A chemical compound having the formula r't o be understood that'I do not limit myselfto the I in which A represents a carbon compound radical V of the benzene series Z represents a carbon compound radical of the amino-anthraquinone series.

2. The compounds having the general formula I in which Y is a carbocyclic radical. 51

3. The dye having the probable form l which gives yellow sulphuric acid solutions, Bordeaux to brown alkaline hydrosulphite vats and dyes cotton in yellow shades and which can be produced by reacting 10 parts of benzoyl-amino-lanthraquinone-G-carbonykchloride with 3.0 parts 1,5-di-amino-anthraquinone in nitrobenzene at about 150 C.

4. The process which comprises condensing 1- benzoyl-amino-anthraquinone 6 carbonyl chloride with mono-benzoyl-1,5-di-amino-anthraquinone at room temperatures while suspended in nitrobenzene.

5. The process which comprises condensing 1- amino-anthraquinone-B-carboxylic acid with a carbonyl halide of the benzene series, converting the resultant to the corresponding anthraquinone-fi-carbonyl halide and condensing said last mentioned compound with a mono-acyl-diamino anthraquinone, the acyl radical of said diamino anthraquinone being of the benzene series.

6. The process which comprises condensing 1- amino-anthraquinone-6-carboxylic acid with benzoyl chloride, converting the resultant to the corresponding l-benzoyl-amino-anthraquinone- 6-carbonyl halide and condensing the same with a mono-benzoyl-diamino-anthraquinone.

'7. The process which comprises condensing 1- amino-anthraquinone-G-carboxylic acid with a carbonyl halide of the benzene series, converting the resultant to the corresponding anthraquinone-6-carbonyl halide and condensing said last mentioned compound with a mono-acyl-diamino 15 anthraquinone.

EARL EDSON BEARD.

Certificate of Correction Patent No. 2,049,189.

July 28, 1936. EARL EDSON BEARD It is hereby certified the numbered patent requiring correction as follows the formula, for AONj"read AO'N C-NZ read-6-0- -Z umn, line 30, for page 3, second column, lines strike out the formula and insert instead o H l-I 1 o H l 1': o

C-QH; 3 0

page 9, second column, line 30, for Iso-phtahahlic read [so-phthalic; andflthetfthe said Letters-Patent should be read with these correc conform tol'th rem that the samema in the Patent Oflice. Signed and sealed this 24th day of November, D. 1936.

[SEAL] sioner of Patents. 

